Evidence map›Paper›PMID 38935123›Full record

ArticleEuropean radiology2024

Synthetic hematocrit from virtual non-contrast images for myocardial extracellular volume evaluation with photon-counting detector CT.

Victor Mergen, Nicolas Ehrbar, Lukas J Moser, Johannes C Harmes, Robert Manka, Hatem Alkadhi, Matthias Eberhard

Abstract read
In one paragraph

Article in European radiology, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
8citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

8 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Extracellular volume fraction by cardiac computed tomography (ECVEuropean heart journal. Imaging methods and practice · 2026
    Review
  3. Article
  4. Advanced myocardial characterization and function with cardiac CT.The international journal of cardiovascular imaging · 2026
    Review
  5. Article
  6. Review
  7. Review
  8. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Victor MergenDiagnostic and Interventional Radiology, University Hospital Zurich, University of Zurich, Zurich, Switzerland.
Nicolas EhrbarDiagnostic and Interventional Radiology, University Hospital Zurich, University of Zurich, Zurich, Switzerland.
Lukas J MoserDiagnostic and Interventional Radiology, University Hospital Zurich, University of Zurich, Zurich, Switzerland.
Johannes C HarmesDiagnostic and Interventional Radiology, University Hospital Zurich, University of Zurich, Zurich, Switzerland.
Robert MankaDiagnostic and Interventional Radiology, University Hospital Zurich, University of Zurich, Zurich, Switzerland.
Hatem AlkadhiDiagnostic and Interventional Radiology, University Hospital Zurich, University of Zurich, Zurich, Switzerland.
Matthias EberhardDiagnostic and Interventional Radiology, University Hospital Zurich, University of Zurich, Zurich, Switzerland. matthias.eberhard@usz.ch.ORCID http://orcid.org/0000-0002-9476-3759

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectivesTo assess the accuracy of a synthetic hematocrit derived from virtual non-contrast (VNC) and virtual non-iodine images (VNI) for myocardial extracellular volume (ECV) computation with photon-counting detector computed tomography (PCD-CT). MATERIALS AND

methodsConsecutive patients undergoing PCD-CT including a coronary CT angiography (CCTA) and a late enhancement (LE) scan and having a blood hematocrit were retrospectively included. In the first 75 patients (derivation cohort), CCTA and LE scans were reconstructed as VNI at 60, 70, and 80 keV and as VNC with quantum iterative reconstruction (QIR) strengths 2, 3, and 4. Blood pool attenuation (BP

resultsIn the derivation cohort (49 men, mean age 79 ± 8 years), a correlation between BP

conclusionSynthetic hematocrit calculated from VNC images enables an accurate computation of myocardial ECV with PCD-CT. CLINICAL RELEVANCE STATEMENT: Virtual non-contrast images from cardiac late enhancement scans with photon-counting detector CT allow the calculation of a synthetic hematocrit, which enables accurate computation of myocardial extracellular volume. KEY POINTS: Blood hematocrit is mandatory for conventional myocardial extracellular volume computation. Synthetic hematocrit can be calculated from virtual non-iodine and non-contrast photon-counting detector CT images. Synthetic hematocrit from virtual non-contrast images enables computation of the myocardial extracellular volume.

Indexed as

Coronary AngiographyAgedAged, 80 and overComputed Tomography AngiographyFemaleHematocritHumansMaleMyocardiumPhotonsRadiographic Image Interpretation, Computer-AssistedReproducibility of ResultsRetrospective StudiesTomography, X-Ray ComputedCardiac imagingExtracellular volumePhoton-counting detector CTSpectral imaging

Identifiers

PMID38935123
PMCPMC11557661

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.